franco morini engine sparkplug

[alfi0161]

Hello. I'm new to this forum, and I need help whit a new spark-plug for my 5.8 morini engine. What other alternatives I have besides the f9rc?

 

[Goat Herder]

I have only used the stock plug in mine.

I started to Google

With the S6S ChampionN82/NGK B10EGV M14 x 1,25 being the stock plug one might check for cross referance charts?

The the S6T Champion L78C M14 x 1,25

The S6E Champion L82 M14 x 1,25

Some one else will eventually chime in?